Pre-desiliconization device

Abstract

The utility model discloses a pre-desiliconization device in the field of aluminum processing equipment, which comprises a heating cylinder and a stirring part positioned in the heating cylinder and used for stirring raw ore pulp, the heating cylinder is provided with a feed port and a discharge port, a spiral heat conduction pipe is annularly arranged in the wall body of the heating cylinder, the spiral heat conduction pipe is communicated with a plurality of straight pipes, and the straight pipes are communicated with the heating cylinder. The two ends of the spiral heat conduction pipe are connected with a liquid inlet and a liquid outlet respectively. The device in the scheme can ensure uniform temperature, reduce temperature loss and ensure that raw ore pulp is fully mixed at a stable temperature.

Description

Technical Field

[0001] The utility model relates to the field of aluminum processing equipment, in particular to a pre-desiliconization device. Background Art

[0002] Alumina is an inorganic substance and a high-hardness compound. It is often used as an analytical reagent, dehydration of organic solvents, adsorbent, organic reaction catalyst, abrasive, polishing agent, raw material for smelting aluminum and refractory material. Alumina has a high application value. When producing alumina, it often contains silicon-containing minerals, which affect the quality of alumina. Therefore, we need pre-desiliconization. Pre-desiliconization is to stir the original ore slurry at above 90°C for 6 to 10 hours before high-pressure dissolution, so that most of the silicon dioxide becomes hydrated sodium aluminosilicate crystals and precipitates in the preheating stage before high-pressure dissolution. The existing stirring mechanism uses a spiral stirring rod for stirring and transmission. However, during the transmission process of the spiral stirring rod, the original ore slurry close to the cylinder wall is not fully mixed, and the cylinder temperature loses quickly, making the temperature uneven, which will lead to low pre-desiliconization efficiency and poor effect. Utility Model Content

[0003] The utility model aims to provide a pre-desiliconization device to solve the problem that the existing pre-desiliconization effect is poor.

[0004] A pre-desiliconization device in the present scheme includes a heating cylinder and a stirring element located inside the heating cylinder for stirring the raw ore slurry. The heating cylinder is provided with a feed port and a discharge port. A spiral heat-conducting pipe is arranged in an inner ring around the wall of the heating cylinder. A plurality of straight pipes are connected to the spiral heat-conducting pipe. The two ends of the spiral heat-conducting pipe are respectively connected with a liquid inlet and a liquid outlet.

[0005] The working principle and beneficial effects of this solution are as follows: when in use, hot water enters from the liquid inlet and flows into the spiral heat pipe. After flowing into the spiral heat pipe, part of the hot water flows downward with the spiral heat pipe, and part of the hot water flows directly from the straight pipe to the bottom of the heating tube. In this way, the top and bottom temperatures in the heating tube can be maintained as much as possible to avoid heat loss during the flow of hot water, which causes a large difference between the bottom temperature and the top temperature. The original ore slurry is placed in the heating tube from the feed port, and the stirring element is turned on for stirring. In the process of transferring the heat of the hot water to the heating tube, the temperature consistency can be guaranteed.

[0006] Furthermore, a heating water tank is connected between the liquid inlet and the liquid outlet. The heating water tank is used to heat water, and then the hot water flows into the heating cylinder from the liquid inlet. The heating water tank is provided with a temperature controller. The temperature of the water is regulated by the temperature controller, generally to 90°C.

[0007] Furthermore, the heating cylinder is provided with an aerogel insulation felt outside. The aerogel insulation felt has an ultra-low thermal conductivity, is relatively thin, has good stability and flame retardancy at high temperatures, has a high hydrophobicity, can be neatly discharged, and is corrosion resistant.

[0008] Furthermore, the stirring member is a spiral stirring rod, which is connected to a motor driving the spiral stirring rod to rotate, and is connected to a plurality of arc-shaped conductive plates, on which a plurality of conductive grooves facing the spiral stirring rod are arranged. When the spiral stirring rod rotates, the conductive plates are driven to rotate, so that the raw ore pulp far away from the spiral stirring rod can be stirred, and the raw ore pulp far away can be driven to approach the spiral stirring rod along the conductive groove, so that it can be stirred by the spiral stirring rod, thereby achieving stable stirring.

[0009] Furthermore, the feed inlet cover is provided with a material blocking door. When the raw ore slurry is put into the heating cylinder, the material blocking door is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic structural diagram of a pre-desiliconization device of the utility model;

[0011] Figure 2 This is an expanded view of the heating cylinder;

[0012] Figure 3 Schematic diagram of the structure of the conductive plate. DETAILED DESCRIPTION

[0013] The following is a further detailed description through specific implementation methods:

[0014] The figure marks in the drawings of the specification include: heating cylinder 1, feed port 2, discharge port 3, material blocking door 4, spiral heat conduction pipe 5, aerogel insulation felt 6, conduction plate 7, conduction groove 8, spiral stirring rod 9, liquid inlet 10, liquid outlet 11, heating water tank 12, straight pipe 13.

[0015] The embodiment is basically as shown in the attached Figure 1 , Figure 2 and Figure 3As shown: a pre-desiliconization device comprises a heating cylinder 1 and a stirring member, the outer wall of the heating cylinder 1 is surrounded by an aerogel insulation felt 6, the heating cylinder 1 is provided with a feed port 2 and a discharge port 3, the feed port 2 is located at the top of the heating cylinder 1, the feed port 2 is covered with a material blocking door 4, the discharge port 3 is located at the bottom of the heating cylinder 1, a spiral heat conducting pipe 5 is arranged in the inner ring of the wall of the heating cylinder 1, four straight pipes 13 are connected to the spiral heat conducting pipe 5, the top end of the spiral heat conducting pipe 5 is connected to a liquid inlet 10, and the bottom end of the spiral heat conducting pipe 5 is connected to There is a liquid outlet 11, and a heating water tank 12 is connected between the liquid inlet 10 and the liquid outlet 11. The heating water tank 12 is used to heat water, and then the hot water flows into the heating cylinder 1 from the liquid inlet 10. The heating water tank 12 is provided with a temperature controller; the stirring member is a spiral stirring rod 9, and the spiral stirring rod 9 is connected to a motor driving it to rotate. The outer shell of the motor is fixedly connected to the heating cylinder 1, and three arc-shaped conduction plates 7 are connected to the spiral stirring rod 9. The conduction plate 7 is provided with a plurality of conduction grooves 8 facing the spiral stirring rod 9.

[0016] When in use, the temperature of the water is regulated by a temperature controller, generally reaching 90°C, and the hot water is pumped out from the heating water tank 12 through the water pump and enters the heating cylinder 1 from the liquid inlet 10. The aerogel insulation felt 6 has an ultra-low thermal conductivity and is relatively thin. It has good stability and flame retardant properties at high temperatures. The aerogel insulation felt 6 has a high hydrophobicity, can be discharged neatly, and is corrosion-resistant. It can insulate the heating cylinder 1, preserve heat, reduce heat loss, and flow into the spiral heat pipe 5. After flowing into the spiral heat pipe 5, part of the hot water flows downward with the spiral heat pipe 5, and part of the hot water flows out from the straight pipe. 13 flows directly down to the bottom of the heating cylinder 1, so that the temperature of the top and bottom of the heating cylinder 1 can be maintained as much as possible to avoid heat loss during the flow of hot water, which makes the temperature difference between the bottom and the top too large. The raw ore slurry is put into the heating cylinder 1 from the feed port 2, the material blocking door 4 is closed, and the motor is turned on. When the motor drives the spiral stirring rod 9 to rotate, it drives the conduction plate 7 to rotate, which can stir the raw ore slurry far away from the spiral stirring rod 9 and drive the raw ore slurry farther away to approach the spiral stirring rod 9 along the conduction trough 8, so that it can be stirred by the spiral stirring rod 9, thereby achieving stable stirring.

[0017] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A pre-desiliconization device, characterized in that: It includes a heating cylinder and a stirring element located inside the heating cylinder for stirring the raw ore slurry. The heating cylinder is provided with a feed port and a discharge port. A spiral heat-conducting pipe is arranged in a ring inside the wall of the heating cylinder. A plurality of straight pipes are connected to the spiral heat-conducting pipe. The two ends of the spiral heat-conducting pipe are respectively connected with a liquid inlet and a liquid outlet.

2. A pre-desiliconization device according to claim 1, characterized in that: A heating water tank is connected between the liquid inlet and the liquid outlet.

3. A pre-desiliconization device according to claim 2, characterized in that: The heating cylinder is provided with aerogel insulation felt outside.

4. A pre-desiliconization device according to claim 3, characterized in that: The stirring member is a spiral stirring rod, which is connected to a motor driving the spiral stirring rod to rotate. The spiral stirring rod is connected to a plurality of arc-shaped conducting plates, and the conducting plates are provided with a plurality of conducting grooves facing the spiral stirring rod.

5. A pre-desiliconization device according to claim 4, characterized in that: The feed inlet cover is provided with a material blocking door.

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